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AfterFast, Reliable Window Replacement Across Kensington
Window replacement in Kensington runs $950-$2,400 per opening for most insert installations, and $1,700-$4,300 for full frame replacements once county permitting, WUI-compliant glazing, and hillside access are accounted for. The job will almost certainly require a Contra Costa County Building Inspection Division permit, because Kensington sits inside a CAL FIRE Very High Fire Hazard Severity Zone and every replacement opening has to meet Wildland-Urban Interface fire code. Our crews know the Kensington inspection flow, the fog-belt rot patterns, and the divided-light Craftsman sashes this neighborhood refuses to give up. Call (888) 635-0804 and we’ll walk you through what your house actually needs before you spend a dollar.
Why TruePane Windows & Doors Is Kensington’s Preferred Window Replacement Company
Kensington is not Berkeley, and it is not El Cerrito. It is unincorporated Contra Costa County, which means every permit goes through the county’s Building Inspection Division on Glacier Drive in Martinez, not a city counter. We have pulled enough Kensington permits to know which forms the county kicks back and which WUI details the inspector checks first. That alone saves homeowners two to four weeks on a typical replacement. Dale Kessler started TruePane in 2008 with a rule he still keeps on the whiteboard: if the pane is not true, the job is not done. We carry that into every Arlington Ave Tudor and every ridge-top bungalow we work on.
When we quote a Window Replacement job in Kensington, we quote the permit, the WUI-compliant glazing, the flashing, and the finish work in writing. Not a line item shows up later that was not on the page. Our technicians are background-checked, uniformed, and trained to measure every opening twice before a single frame is ordered. And when you call, a live person answers. Not a tree. Not a callback form. That matters in a neighborhood where original fir frames rot faster than anyone expects.
We work throughout Kensington regularly. We know the hillside lots above Colusa Circle, the shaded canyons off Arlington, and the ridge lines near Tilden’s east edge. The moisture up here is not abstract. It is in your window jambs. We scope for it before we quote.
Our Window Replacement Services in Kensington
Full Frame Replacement
When the original sash, frame, and rough opening are all compromised, full frame replacement is the honest fix. In Kensington, this usually means pulling a 1920s or 1930s fir frame that has been drinking fog-belt condensation for eight decades and setting a new WUI-rated frame, flashing every jamb, and restoring exterior casing to match the original profile. Full frame work in Kensington typically runs $1,700-$4,300 per opening. We handle the county permit drawings, the fire-code product compliance, and the finish carpentry so the new window looks like it belongs on the house rather than bolted to it.
Insert Window Replacement
For Kensington homes where the original frame is still sound, an insert replacement preserves the existing casing and trim while replacing the sash, balances, and glass. This is the right call for many Craftsman and Tudor Revival houses that keep their exterior character intact behind new Energy-Efficient Windows - Kensington inside the original frame. Inserts run $950-$2,400 per opening in Kensington’s market. We spec the divided-light pattern to match the original muntins, because no homeowner in this neighborhood wants a flat pane that erases a century of proportion.
Storm Window Replacement
Some Kensington homeowners keep the original single-pane wood windows and add or replace exterior storm units or Sliding & Patio Doors - Kensington instead of tearing out historic fabric. We source storm windows sized to the original openings, with low-E glass where the county accepts it under WUI code. Storm work runs $700-$1,800 per unit. It is a quieter, cheaper way to cut drafts on a ridge line where afternoon winds lean hard on west-facing walls, and it keeps the original window untouched for future restoration.
Energy-Efficient Upgrade
Most Kensington houses were built before double glazing existed, so the utility bill is not the only thing leaking. We upgrade to WUI-rated low-E insulated glass units with argon fill and fusion-welded frames, which meet both the county’s fire-hardening rules and the energy expectations of a house that will stand another century. Upgrades in Kensington typically run $1,100-$2,800 per opening depending on glazing spec and frame material. We register both manufacturer warranty layers in writing before the truck leaves your driveway, and we state the warranty durations on paper, not in a sales pitch.
Historic Window Restoration
Where the original windows are worth saving, we restore rather than replace. That can mean epoxy repairs on rotted fir sashes, new weight cords and bronze weatherstripping, or re-bedding original divided lights. Kensington’s Tudor Revival and Spanish Colonial Revival homes lean on us for restoration work and Glass Railing Systems - Kensington that a vinyl replacement company would not attempt. Restoration runs $650-$1,900 per sash depending on scope. We work with the county on what can be repaired in place under WUI code, and we never remove more original material than the inspector requires.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Kensington
We are an authorized installer for more than a dozen manufacturer lines, including. For Kensington’s WUI and coastal-climate requirements, we also work regularly with CGI, CWS, and ES Windows. Not every manufacturer offers fire-resistant glazing options that pass Contra Costa County inspection. We maintain a working knowledge of which product lines actually meet WUI glazing standards and which ones will get flagged. When we quote, we put the manufacturer’s name, the model series, the glass package, and the warranty terms side by side on paper so you see exactly what you are buying. We stock common hardware and weatherstripping for the brands we install, which shortens turnaround on service calls in Kensington significantly.
Common Window Replacement Problems We See in Kensington Homes
- Fog-belt rot in original fir frames: Kensington’s elevation puts it square in the marine fog belt that rolls in from the Bay. Original fir and redwood frames absorb that overnight moisture for months at a time, and we regularly find the bottom rails so soft a screwdriver sinks into them. The fix is full frame replacement, not caulk.
- Failed seals on west-facing double-hungs: Decades of temperature swings and coastal moisture have broken the seals on most original insulated units that were retrofitted in the 1980s and 1990s. The tell is fog between the panes that never clears. We replace the IGU and re-reglaze the sash to stop the fog for good.
- Drainage failure on hillside lots: Many Kensington houses sit on sloped or stepped lots where runoff finds the low side of a window jamb. If the grade is not reset or a perimeter drain added when the window goes in, the new unit leaks within two fog cycles. We scope drainage as part of every Kensington quote, not as an afterthought.
- Red-tagged WUI non-compliance: We have seen contractors spec standard vinyl windows from flatland supply houses and get the whole job flagged at county inspection because the glazing does not meet Kensington’s fire-hardening mandate. That means tear-out and reorder, paid for twice by the homeowner. We spec WUI-compliant glass from the first measure.
Pricing for Window Replacement in Kensington, CA
Expect to pay $950-$2,400 per opening for insert replacements, $1,700-$4,300 for full frame work, and $1,100-$2,800 for energy-efficient upgrades with WUI glazing. Storm windows run $700-$1,800 per unit, and historic sash restoration lands between $650 and $1,900 per sash. What moves the price is frame condition, glazing spec, divided-light replication, hillside access, and whether we are pulling county permits for one window or twelve. We quote line by line, in writing, before any deposit changes hands. A square deal, Dale calls it. Call (888) 635-0804 for a free estimate and we will scope your house the way we would scope our own mother’s.
We Also Serve Cities Near Kensington
Our crews work throughout Window Replacement in Kensington and the surrounding East Bay communities. We regularly take on projects in Parkway, Arden-Arcade, Ladera Heights, and Commerce. The permit office changes, the fog line shifts a little, and the housing stock varies, but the rule holds: if the pane is not true, the job is not done.
Serving Kensington, CA - Our Local Coverage Area
We’re based in the Kensington area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs - Window Replacement in Kensington
Yes. Every window replacement in Kensington requires a Contra Costa County Building Inspection Division permit, because the neighborhood is unincorporated and sits inside a CAL FIRE Very High Fire Hazard Severity Zone. We pull the county permit for you and coordinate the inspection. Call (888) 635-0804 and we will check your scope before you sign anything.
Yes, every replacement window in Kensington must meet California’s Wildland-Urban Interface fire-resistant glazing and frame standards under county inspection. Standard vinyl windows from a flatland supply house will not pass. We spec WUI-compliant glass from the first measure so you never pay for a red tag. For an exact quote on WUI-compliant windows, call (888) 635-0804.
No, standard vinyl cannot match the small divided-light sashes and thin muntin profiles on a 1920s Kensington Craftsman. We use wood-clad or custom semi-custom units and spec the divided-light layout to mirror the original proportions. The character of the house stays intact while the glass and weather sealing get the modern upgrade. Call us to see the side-by-side product options on paper.
Kensington sits high enough to live in the marine fog belt that pushes in from San Francisco Bay, so original fir and redwood frames get coated in overnight moisture for most of the summer. That accelerates rot in the bottom rails and oxidizes hardware noticeably faster than in El Cerrito or Richmond. The fix is replacing the frame with rot-resistant wood or engineered material, not patching wet wood. We scope for this on every Kensington estimate.
Yes, we map any septic tank, leach field, or well setback on your Kensington lot before staging equipment or digging for drainage work. Replacement windows rarely disturb the septic system, but on small hillside lots the setback can affect ladder placement, scaffold pads, and where materials are staged. We flag it in the written quote and plan around it. Call (888) 635-0804 and we will walk your lot with you.
We schedule Kensington estimates on a route that runs through the Berkeley and Kensington hills weekly, so most homeowners see us at the house within five to seven business days. A live person answers the phone around the clock, so you are never leaving a message and hoping. For a free estimate and a line-by-line written quote, call (888) 635-0804.
Call TruePane for Kensington Window Replacement
If your Kensington windows are fogged, rotting, drafty, or failed a county inspection, the right time to address them is before the next fog cycle rises off the Bay. We will measure every opening twice, spec WUI-compliant glass that clears the county on first inspection, register both warranty layers in writing, and stand behind the work for 90 days with the Done Right Promise. No fine print. No arguing. Call (888) 635-0804 to schedule your free Kensington window replacement estimate.
Written by Dale Kessler, Owner at TruePane Windows & Doors, serving Kensington and the greater East Bay.